IEC 60898 - Relates to Low Voltage Circuit Breakers for use in household and similar Installations. In the UK traditionally known as miniature circuit breakers (MCB’s). IEC 60947-2 Relates to Low Voltage Circuit Breakers for use in industrial and similar Installations. In the UK traditionally known as moulded case circuit breakers (MCCB’s) and also air circuit breakers (ACB’s)